Description
The Pen Type Electric Grinder is the ultimate detailer’s wand. Shaped like a thick marker, it offers the ergonomics of a pen with the power of a high-speed motor. It is a favorite among 3D printing hobbyists for removing stubborn supports, jewelers for polishing, and makers for engraving glass, wood, or metal.
Unlike industrial Dremel tools, this pen-style grinder focuses on maneuverability and variable speed control, allowing you to switch from high-speed grinding to low-speed delicate polishing with a simple thumb dial or button. Most modern versions are USB-rechargeable, freeing you from tangled cords during delicate operations.
Features
Ergonomic "Pen" Grip: Slim, non-slip body design allows for pencil-style control, reducing hand fatigue during long sessions of engraving or sanding.
Variable Speed Control: Typically offers 3 to 5 speed stages (ranging from 3,000 to 20,000 RPM) to suit different materials.
Universal Chuck/Collet: Compatible with standard 2.35mm or 3.0mm bits, allowing you to use a vast library of existing burrs, brushes, and stones.
USB Rechargeable: Built-in lithium-ion battery provides cordless freedom for up to 60 minutes of continuous use.
Quiet Operation: Engineered with high-quality bearings to minimize vibration and noise, making it suitable for indoor or apartment use.
Overload Protection: Automatically shuts off the motor if the bit gets snagged to prevent internal circuit damage.
Specifications
Motor Speed: 3,000−20,000 RPM
Power Source: 3.7V Li-ion Battery or USB 5V DC
Collet Size: 2.35mm
Charging Port: USB-C or Micro-USB
Material: ABS Plastic Shell / Aluminum Alloy Head
Typical Run Time: 45−90 minutes (Depending on load)
Max Torque: ~30–50 g/cm
